Share 'Is there a genetic basis to skepticism?'

The other day I heard my new favorite catch phrase du jour while watching a popular T.V. show. "only the paranoid survive". And I got to thinking "What would E.O. Wilson have to say about that?" So I asking (since we're atheists here) is there a genetic component to skepticism that makes us 'slip away from the herd' and how would this have added to our species fitness?